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Radar - Specs & Discussions

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SaiK
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Re: Radar - Specs & Discussions

Postby SaiK » 06 Nov 2015 03:30

brar_w wrote:
SaiK wrote:^those ranges are one hundred % unkill infra! massive layouts based on airfield designs.. so that targets can land, get measured, and take off!

Most of the stuff that gets tested on these poles is not a 'flying test article'.

Interesting.. then it directly contradicts (assuming pole based testing requires certain modification to platform to get hosted above) with need to fly in. Or is it that these are jigs than lock on to the landing gear?

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Re: Radar - Specs & Discussions

Postby brar_w » 06 Nov 2015 04:27

SaiK wrote:Interesting.. then it directly contradicts (assuming pole based testing requires certain modification to platform to get hosted above) with need to fly in. Or is it that these are jigs than lock on to the landing gear?


viewtopic.php?f=3&t=7088&p=1928020#p1928020

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Re: Radar - Specs & Discussions

Postby kit » 11 Nov 2015 12:37

Austin wrote:New Dual Band Array Radar from IAI , Terra System

https://youtu.be/9kK9fh8235E

Israel Aerospace Industries Unveils Dual-Band Radar System


Designed to search, detect, track and target multiple threats simultaneously, the new Terra system is operational with at least one customer nation :mrgreen: , a company executive said Monday.

in addition to the expense only very few countries have that kind of requirement and its certainly not one of the west asian countries or china .. south Korea is a distinct possibility

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Re: Radar - Specs & Discussions

Postby Karan M » 11 Nov 2015 13:48

Yes, South Korea is the most likely customer with NoKo around the corner. In the past, they purchased Super GP too. Don't worry, my prediction is Sengupta will promptly claim its India and we have a secret deal to have these. 1, 2, 3...:mrgreen:

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Re: Radar - Specs & Discussions

Postby jayasimha » 22 Nov 2015 20:11

http://www.microwavejournal.com/article ... akthroughs

Radar and Phased Array Breakthroughs

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Re: Radar - Specs & Discussions

Postby brar_w » 22 Nov 2015 20:43

Gallium Nitride is now standard for any upgrade or new start radar, or electronic warfare product since all the major contractors have secured the required MRL (Manufacturing readiness level) for their foundries. Northrop Grumman and Raytheon had secured capability about a decade ago from the DARPA funded efforts while Lockheed's approach has been (similar to SAAB, THALES etc) to work with existing third party foundries. S Band, UHF band, X-Band, C-Band, L-Band modules are now readily available for all applications. Raytheon has also quietly moved to replacing GaA semiconductors on the THAAD to Gallium Nitride as plug and play replacements. Also of note is the massive Space Fence sensor that along with the AMDR is the largest industrial defense application for Gallium Nitride till date..Until thermal management in complex systems (such as fighter aircraft, bombers, AWACS etc) is sorted out gallium nitride will appeal as a material of choice to those applications that want a considerable power within a constrained size and weight. For example, the Next gen. Jammer would not have been possible without GaN as no contractor could meet the RFP's specified in its contract by using GaA since the size and weight of the product would not have been Growler compatible. Similarly the new Burke could manage to get that multiple times performance of the Spy-1 through the Spy-6 because it shifted to Gallium Nitride - Sticking to GaA would have meant a larger radar which the ship would have most likely not been able to accommodate. However the real benefits would kick in a decade or so down the road when in say fighter aircraft the thermal management capability advances to a point where you can embed GaN modules throughout the skin of the aircraft allowing for incredible situational awareness. At the moment the best you can do is put a GaN unit on the nose that can give smaller fighter radomes (such as the gripen or rafale or F-16 etc) ranges of much larger fighters (such as F-15, F-22 etc) but aside from that it is the thermal management that is really holding these applications back. There needs to be at least a 2-3x increase in electric generation and thermal management for GaN's to really come of age in tactical platforms and that will most likely be a design goal for next generation systems.

The technology itself is now standard but it will take time to proliferate into systems since the IOC of those systems are replacement cycle dependent and not tech dependent. For significant leaps however, the thermal management capacity needs to advance and there are some very interesting programs currently on to get there but no one is really there yet.

http://www.darpa.mil/program/intrachip- ... ed-cooling

The guy leading the effort did a Janes briefing that I had access too and its definitely a field that is going to have to mature for next generation systems to fully exploit these advances in capability beyond traditional radar applications.

Image
Image

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Re: Radar - Specs & Discussions

Postby Thakur_B » 10 Apr 2016 11:38

Photo credit Sayareakd:
Image
Through Wall Imaging Radar (TWIR) 'Divya Chakshu'
Image
Ground Penetration Radar (GPR)

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Re: Radar - Specs & Discussions

Postby Kersi D » 22 Jun 2016 13:05

I understand that the old Thomson CSF, now Thales, THD 1955 radars are still being sued by India/IAF

Can someone tell me the locations (Lat n Long, if possible) of these radars ?

The sites I am aware are
1) Chimney Hills - Bangalore
2) Arjangarh - Rajkokri near Dilli
3) Jamnagar
4) Jodhpur
5) Laitkor Peak, Shillong
6) Salua ? West Bengal

I believe that we have some 12-13 radar sites

Regards
Kersi

PS Awaiting Brickbats test edit
Last edited by Gerard on 10 Aug 2016 07:01, edited 1 time in total.
Reason: Testing

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Re: Radar - Specs & Discussions

Postby Gerard » 10 Aug 2016 06:44

...

wig
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Re: Radar - Specs & Discussions

Postby wig » 05 Sep 2016 09:44

http://www.tribuneindia.com/news/nation ... 90573.html

defMin to procure 45 bird-detecting radars
with bird hits accounting for over 25 per cent of aircraft accidents, the Ministry of Defence (MoD) is procuring bird-detection radars that would be installed to detect and track avian activity in the vicinity of airfields.
The MoD has projected a requirement of 45 Bird Detection and Monitoring Radar Systems to reduce the risk of bird strike during air operations. Increasing habitations around airports and airbases and unregulated disposal of garbage attract birds, posing a risk to flight safety.
Bird hits affect military as well as civilian aircraft, particularly at low altitude, though there have been instances of large birds hitting aircraft at high altitudes too. While a bird hit may not cause an air crash, it damages the airframe or the engines. Fighter aircraft are more susceptible to a crash resulting from a bird hit and a number of pilots have lost their lives in this manner.
The MoD wants bird radars that are deployable at all altitudes in India and able to withstand weather conditions encountered across the country, according to a request for information issued by it earlier this week. Besides being road-mobile, the system should be able to detect large birds at a distance of 11 km and small birds up to 6 km, with a large screen to display the air situation picture.
At present, the IAF uses human teams equipped with binoculars and sound guns to survey bird activity, along with some other rudimentary measures to ward off birds near the runway. Employment of human teams has had limitations due to the visual capability of the human eye, bad weather, low night or darkness. Avian radars use acoustic signatures and lasers to detect birds.
The IAF has an Ornithology Cell in its Directorate of Aerospace Safety, which studies bird activity in relation to air operations and devises ways and procedures to mitigate bird hazard. The MoD has been planning to procure avian radars for a long time. While several foreign firms manufacture such systems, prototypes have also been developed by Indian firms.

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Re: Radar - Specs & Discussions

Postby Kersi D » 06 Sep 2016 13:21

Karan M wrote:Erstwhile? They are still being used..


Can you tell me the locations ? On k e r s i k d o t i w a l l a A T r e d i f f m a i l d o t com

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Re: Radar - Specs & Discussions

Postby Neshant » 11 Sep 2016 13:34

Image

http://www.iflscience.com/technology/ne ... s-objects/

New Invisibility Cloak Completely Conceals Objects
(sure to be used on all kinds of aircraft, missiles, ships..etc)

Science may have just given us one of the greatest gifts foretold by science fiction: invisibility cloaking. The experimental device is thin and flexible and can be applied to objects of very different sizes. The announcement comes from Dr. George Eleftheriades from the University of Toronto’s Department of Electrical & Computer Engineering and was published in Physical Review X.

This is not the first attempt for a cloaking device; it has been a highly researched area for years. This past spring, Michigan Technological University announced a cloaking system that used a dielectric coating to reflect and distort electromagnetic radiation waves used to find objects. This new cloaking system, however, uses an ultra-thin layer of antennae which emits a signal to completely cancel out any reflection from radar, instead of merely distorting it.

Additionally, the invisibility cloak can be used to deceive detection devices by sending signals to make the hidden object seem bigger, smaller, or even in a completely different location. This is achieved by an active looping system from the antennae that are in tune with the device trying to locate it. This is done manually for now, but future versions may be able to automatically register the incoming frequency and adjust in order to cancel it.

Work on this project began around seven years ago, but early prototypes required thick coatings of metamaterials, which was not practical for large objects. The current cloaking system can easily be scaled to hide objects of any size. This has obvious implications for military stealth operations and surveillance, but it could also be used to improve communication signals by effectively “hiding” any obstacles that interfere with signal strength.

This cloaking system currently just works with radio waves, but the research team says that this technology could be further developed to create the same results with with terahertz radiation (the region between infrared and microwave radiation) and could even work with light waves.

Considering we weren’t even supposed to know about invisibility cloaking until 2152 when humans first make contact with the Romulans, this is an amazing technological advance.

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Re: Radar - Specs & Discussions

Postby malushahi » 04 Oct 2016 20:46

South Korean ABM radars stopped 21 times in 3 years: data

SEOUL, Oct. 3 (Yonhap) -- Two anti-ballistic missile radars were found to have stopped 21 times in the past three years due to a glitch in their systems, defense ministry data showed Monday.

The data, which was submitted to Rep. Lee Chul-gyu of the ruling Saenuri Party ahead of a parliamentary audit, showed that of the two Green Pine radars stationed in South Chungcheong and North Chungcheong provinces, one had stopped 13 times in the period since July 2013, while the other had stopped eight times in the same period.

The radars, which are used as an early warning system for ballistic missiles, were out of operation for up to nine days at a time.

South Korea's military acknowledged the flaw, saying that it was caused by condensation forming inside the radars' antennae. It insisted, however, that the problem had not affected its monitoring of North Korea's missile programs, as there were other radars installed on its Aegis destroyers to carry out that work.

The Air Force has temporarily installed air conditioners on the machines to prevent moisture from condensing inside them.

"By next year, we plan to buy 'radomes' to cover the radars and permanently solve the condensation problem," said an Air Force official who spoke on the condition of anonymity.


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Re: Radar - Specs & Discussions

Postby Kersi D » 23 Nov 2016 13:32

Any idea what is this structure or equipment at 30*25'8"N and 75*33'1" ?

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Re: Radar - Specs & Discussions

Postby K_Rohit » 23 Nov 2016 15:14

Kersi D wrote:Any idea what is this structure or equipment at 30*25'8"N and 75*33'1" ?


Aerostat tether station?

Kersi D
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Re: Radar - Specs & Discussions

Postby Kersi D » 23 Nov 2016 18:19

K_Rohit wrote:
Kersi D wrote:Any idea what is this structure or equipment at 30*25'8"N and 75*33'1" ?


Aerostat tether station?



Aerostat tether station is near by. Could this be THD 1955 ?

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Re: Radar - Specs & Discussions

Postby rohitvats » 23 Nov 2016 18:26

Kersi D wrote:
K_Rohit wrote:
Aerostat tether station?



Aerostat tether station is near by. Could this be THD 1955 ?


Read this report - it will tell you what might be there.

http://indianexpress.com/article/india/india-news-india/pranab-mukherjee-to-award-presidents-colours-to-30-air-force-squadron-3737314/

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Re: Radar - Specs & Discussions

Postby shiv » 29 Jan 2017 17:14

Could someone point me to efforts being made in India to detect stealth aircraft or do we still have radar tech to detect only flying barns, and stuff that is switched off at night?

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Re: Radar - Specs & Discussions

Postby Neela » 02 Mar 2017 14:07

http://www.thehindu.com/news/national/army-gets-indigenous-weapon-locating-radar/article17392500.ece


Defence Minister Manohar Parrikar said the export potential (of the WLR) would be explored only after the Army’s requirement is fulfilled.


Army Chief Gen Bipin Rawat called the system a success. “It is being used extensively along the LoC by us,” he stated.

Swati has a range of 50 km, which brings all artillery guns presently in service worldwide under coverage. Four systems are currently in operation and another 30 are on order for the Army.

Talking about the capability of the system, a senior Defence official said it was pressed into service along the LoC last year. The WLR played a major role in suppressing their [Pakistani] fire, he adde

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Re: Radar - Specs & Discussions

Postby Singha » 02 Mar 2017 14:31

must have been a long delay in productionising this system due to glitches or covert sanctions. I recall ages ago a order for 28 was placed of this rajendra derived radar.

the 8 or 12 ANTPQ37 radars we purchased post kargil - iirc have they all packed up due to lack of spares and vendor support ?

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Re: Radar - Specs & Discussions

Postby Nick_S » 02 Mar 2017 16:50


Karan M
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Re: Radar - Specs & Discussions

Postby Karan M » 02 Mar 2017 19:52

Singha wrote:must have been a long delay in productionising this system due to glitches or covert sanctions. I recall ages ago a order for 28 was placed of this rajendra derived radar.

the 8 or 12 ANTPQ37 radars we purchased post kargil - iirc have they all packed up due to lack of spares and vendor support ?


Order was placed only recently. March 2016.

Cleared trials earlier, then stuck waiting for orders + more trials. Per latest reports some 4 are in service and 30 are planned.

http://epaperbeta.timesofindia.com/Arti ... 2016021011

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Re: Radar - Specs & Discussions

Postby Karan M » 02 Mar 2017 21:25


Indranil
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Re: Radar - Specs & Discussions

Postby Indranil » 20 Mar 2017 23:19

Cross post: Uttam AESA radar details



1. Each TR module is 10 W working at 1 GHz (X-band). Four TR module per "package"
2. When they went for volume production, components (power amplifier) were denied. The speaker calls it blessing in disguise 8) . They had foreseen this and had started co-development with Astra microwave ahead of time. Last year, they qualified the indigenous QTRMs. BEL and Astra have already developed more than 4,000 units. The QTRMs are being used for 3 other strategic ground array systems.
3. Planks are packaged using vacuum brazing. They started with debrazing but could not qualify it inspite of many iterations. The vacuum brazed package works very well and has been indigenized.
4. Exciter/Reciever module: indigenous and qualified
5. Array power supply unit: indigenous and qualified
6. Cooling unit: indigenous and qualified
7. Complete array has been recently qualified. Safety of flight qualified. Ready for installation on the aircraft.
8. +-60 degree
9. Range: 115 km (subjective). Can be increased or decreased based on cooling, space and mission requirements.
10. Roof top testing done for qualification. Criticality lies in the software. Mission objectives need to be defined properly.

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Re: Radar - Specs & Discussions

Postby srai » 21 Mar 2017 09:12

malushahi wrote:throwback:

Anantha Krishnan M ‏@writetake

...

Image

Image


56 Avros in the IAF service have plenty of life left. When they get replaced by C-295, DRDO should look to acquire a bunch of these as airborne test platforms for radars, sensors, avionics, and counter measures. Full mockup (but functional) cockpit in the inside can be integrated with the radars and sensors and tested in flying conditions.

Image

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Re: Radar - Specs & Discussions

Postby Karan M » 29 May 2017 21:23


Thakur_B
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Re: Radar - Specs & Discussions

Postby Thakur_B » 29 May 2017 21:53

Which truck is that?

rahulm
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Re: Radar - Specs & Discussions

Postby rahulm » 29 May 2017 22:14

I think it's a MAN tractor

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Re: Radar - Specs & Discussions

Postby Bheeshma » 29 May 2017 22:44

I think it may be Scania ?

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Re: Radar - Specs & Discussions

Postby Karan M » 29 May 2017 23:54

Only on BR can you find uber jingos who can't resist finding out even which truck is towing a radar.

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Re: Radar - Specs & Discussions

Postby dinesh_kimar » 29 May 2017 23:56

MAN.

Khalsa
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Re: Radar - Specs & Discussions

Postby Khalsa » 30 May 2017 01:30

Karan M wrote:Only on BR can you find uber jingos who can't resist finding out even which truck is towing a radar.

:rotfl: :rotfl: :rotfl: :rotfl:

Love it and Love us all

Chanda Ek, Tarre Anek !!

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Re: Radar - Specs & Discussions

Postby Mort Walker » 31 May 2017 07:10

Are there any specifications for public consumption on the Arudhra?

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Re: Radar - Specs & Discussions

Postby Thakur_B » 31 May 2017 11:28

rahulm wrote:I think it's a MAN tractor


Thanks. Indeed looks like MAN. Agni 5 (Volvo) and arudhra, both system seem to be mounted on commercial vehicles and not ruggedised Tata/AL/tatra trucks.

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Re: Radar - Specs & Discussions

Postby tsarkar » 31 May 2017 11:32

Indranil wrote:1. Each TR module is 10 W working at 1 GHz (X-band). Four TR module per "package"
2. When they went for volume production, components (power amplifier) were denied. The speaker calls it blessing in disguise 8) . They had foreseen this and had started co-development with Astra microwave ahead of time. Last year, they qualified the indigenous QTRMs. BEL and Astra have already developed more than 4,000 units. The QTRMs are being used for 3 other strategic ground array systems.
3. Planks are packaged using vacuum brazing. They started with debrazing but could not qualify it inspite of many iterations. The vacuum brazed package works very well and has been indigenized.
4. Exciter/Reciever module: indigenous and qualified
5. Array power supply unit: indigenous and qualified
6. Cooling unit: indigenous and qualified
7. Complete array has been recently qualified. Safety of flight qualified. Ready for installation on the aircraft.
8. +-60 degree
9. Range: 115 km (subjective). Can be increased or decreased based on cooling, space and mission requirements.
10. Roof top testing done for qualification. Criticality lies in the software. Mission objectives need to be defined properly.


Indranil, the hardware is not as critical as the software. Even for original Tejas MMR, the hardware was quite up to the mark. Its the software development & testing that faltered. The previous MMR could do only Single Target Track and Multi Target Track mode was taking a lot of time to develop. The A2G modes were not even in the roadmap. Which is why Elta 2032 was chosen.

Do you have any updates on which modes of Uttam have completed development, testing and certification?

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Re: Radar - Specs & Discussions

Postby brar_w » 31 May 2017 16:40

Indranil wrote:1. Each TR module is 10 W working at 1 GHz (X-band). Four TR module per "package"



1GHz probably refers to the frequency range of the PA's used and not the operating frequency, for the radar since 1 GHz frequency coverage from Amplifiers would put them in the L Band. X-Band is between 8 and 12 GHz.

See HERE for a 1 GHz range Amplifier operating at X-Band. Ideally, on an advanced airborne AESA radar you want as great a bandwidth and coverage possible to maximize LPI and to make it jam-resistant (plus extract other uses from it such as airborne electronic attack).

See THIS for something that practically covers the entire X-band frequency range. With wide range PAs, you run into the problem of lower power requiring more modules, and also lower efficiency which again requires more input power and as a result more cooling. But they possess other attributes that make them desirable for such applications (fighters), whereas you can relax the bandwidth coverage for more effecient and powerful designs for applications where these attributes are less important, such as a SAR sensor, or an exclusive BMD radar etc. However, third generation GaAs and first and second generation GaN high frequency power amplifiers both provide considerable transmitting power along with a wide frequency range.


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